Huang Linshu, Yao Kainan, Chen Lu, Wang Jianli, Liu Yinnian
Opt Express. 2024 Feb 12;32(4):5996-6010. doi: 10.1364/OE.514790.
Bright daylight photon noise and the saturation of wavefront sensors pose challenges to high-resolution daytime imaging. In this paper, a daytime hybrid wavefront sensor (HyWFS) approach for real-time wavefront sensing in daylight adaptive optics (AO) is described. The Shack-Hartmann wavefront sensor (SHWFS) algorithm is used to efficiently compensate large-scale wavefronts, while the pyramid wavefront sensor (PyWFS) algorithm offers highly sensitive correction of small wavefronts. Daylight closed-loop AO experiments were performed using the daytime HyWFS approach with both algorithms, respectively. The experiment results indicate that the proposed approach provides accurate daylight AO correction and allows for a simple switch between the two algorithms without increasing system complexity. The daytime HyWFS approach can serve as an alternative for daylight natural guide star AO, enabling high-resolution observation of resident space objects no longer limited to dawn and dusk.
明亮的日光光子噪声和波前传感器的饱和对高分辨率日间成像构成挑战。本文描述了一种用于日光自适应光学（AO）中实时波前传感的日间混合波前传感器（HyWFS）方法。夏克-哈特曼波前传感器（SHWFS）算法用于有效补偿大规模波前，而金字塔波前传感器（PyWFS）算法则对小波前提供高度灵敏的校正。分别使用这两种算法的日间HyWFS方法进行了日光闭环AO实验。实验结果表明，所提出的方法提供了精确的日光AO校正，并允许在两种算法之间进行简单切换而不增加系统复杂性。日间HyWFS方法可作为日光自然导星AO的替代方案，实现对在轨空间目标的高分辨率观测，且不再局限于黎明和黄昏时段。
